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annotate hgext3rd/topic/stack.py @ 1955:5452a575b4e5

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topic: extract display from entry computation We are about to reverse the order of the output (most recent first) so it will be useful.
author Pierre-Yves David <pierre-yves.david@fb.com>
date Fri, 01 Apr 2016 16:55:24 -0700
parents 61f36480740f
children d8f1e432b16a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1895
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1 # stack.py - code related to stack workflow
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2 #
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3 # This software may be used and distributed according to the terms of the
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4 # GNU General Public License version 2 or any later version.
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5 import collections
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6 from mercurial.i18n import _
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7 from mercurial import (
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8 error,
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9 obsolete,
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10 )
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11
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12 def getstack(repo, topic):
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13 # XXX need sorting
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14 trevs = repo.revs("topic(%s) - obsolete()", topic)
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15 return _orderrevs(repo, trevs)
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16
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17 def showstack(ui, repo, topic, opts):
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18 if not topic:
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19 topic = repo.currenttopic
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20 if not topic:
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21 raise error.Abort(_('no active topic to list'))
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22 fm = ui.formatter('topicstack', opts)
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23 prev = None
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24 entries = []
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25 for idx, r in enumerate(getstack(repo, topic), 1):
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26 ctx = repo[r]
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27 p1 = ctx.p1()
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28 if p1.obsolete():
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29 p1 = repo[_singlesuccessor(repo, p1)]
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30 if p1.rev() != prev:
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31 entries.append((None, p1))
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32 entries.append((idx, ctx))
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33 prev = r
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34
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35 # super crude initial version
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36 for idx, ctx in entries:
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37 if idx is None:
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38 symbol = '_'
1955
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39 state = 'base'
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40 elif repo.revs('%d and parents()', ctx.rev()):
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41 symbol = '@'
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42 state = 'current'
1955
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43 elif repo.revs('%d and unstable()', ctx.rev()):
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44 symbol = '$'
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45 state = 'unstable'
1955
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46 else:
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47 symbol = ':'
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48 state = 'clean'
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49 fm.startitem()
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50 if idx is None:
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51 fm.plain(' ')
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52 else:
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53 fm.write('topic.stack.index', 't%d', idx,
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54 label='topic.stack.index topic.stack.index.%s' % state)
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55 fm.write('topic.stack.state.symbol', '%s', symbol,
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56 label='topic.stack.state topic.stack.state.%s' % state)
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57 fm.plain(' ')
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58 fm.write('topic.stack.desc', '%s', ctx.description().splitlines()[0],
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59 label='topic.stack.desc topic.stack.desc.%s' % state)
1955
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60 fm.condwrite(state != 'clean' and idx is not None, 'topic.stack.state',
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61 ' (%s)', state,
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62 label='topic.stack.state topic.stack.state.%s' % state)
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63 fm.plain('\n')
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64 fm.end()
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65
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66 # Copied from evolve 081605c2e9b6
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67
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68 def _orderrevs(repo, revs):
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69 """Compute an ordering to solve instability for the given revs
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70
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71 revs is a list of unstable revisions.
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72
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73 Returns the same revisions ordered to solve their instability from the
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74 bottom to the top of the stack that the stabilization process will produce
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75 eventually.
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76
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77 This ensures the minimal number of stabilizations, as we can stabilize each
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78 revision on its final stabilized destination.
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79 """
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80 # Step 1: Build the dependency graph
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81 dependencies, rdependencies = builddependencies(repo, revs)
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82 # Step 2: Build the ordering
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83 # Remove the revisions with no dependency(A) and add them to the ordering.
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84 # Removing these revisions leads to new revisions with no dependency (the
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85 # one depending on A) that we can remove from the dependency graph and add
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86 # to the ordering. We progress in a similar fashion until the ordering is
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87 # built
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88 solvablerevs = [r for r in sorted(dependencies.keys())
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89 if not dependencies[r]]
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90 ordering = []
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91 while solvablerevs:
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92 rev = solvablerevs.pop()
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93 for dependent in rdependencies[rev]:
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94 dependencies[dependent].remove(rev)
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95 if not dependencies[dependent]:
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96 solvablerevs.append(dependent)
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97 del dependencies[rev]
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98 ordering.append(rev)
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99
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100 ordering.extend(sorted(dependencies))
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101 return ordering
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102
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103 def builddependencies(repo, revs):
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104 """returns dependency graphs giving an order to solve instability of revs
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105 (see _orderrevs for more information on usage)"""
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106
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107 # For each troubled revision we keep track of what instability if any should
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108 # be resolved in order to resolve it. Example:
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109 # dependencies = {3: [6], 6:[]}
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110 # Means that: 6 has no dependency, 3 depends on 6 to be solved
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111 dependencies = {}
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112 # rdependencies is the inverted dict of dependencies
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113 rdependencies = collections.defaultdict(set)
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114
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115 for r in revs:
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116 dependencies[r] = set()
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117 for p in repo[r].parents():
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118 try:
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119 succ = _singlesuccessor(repo, p)
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120 except MultipleSuccessorsError as exc:
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121 dependencies[r] = exc.successorssets
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122 continue
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123 if succ in revs:
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124 dependencies[r].add(succ)
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125 rdependencies[succ].add(r)
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126 return dependencies, rdependencies
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127
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128 def _singlesuccessor(repo, p):
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129 """returns p (as rev) if not obsolete or its unique latest successors
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130
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131 fail if there are no such successor"""
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132
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133 if not p.obsolete():
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134 return p.rev()
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135 obs = repo[p]
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136 ui = repo.ui
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137 newer = obsolete.successorssets(repo, obs.node())
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138 # search of a parent which is not killed
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139 while not newer:
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140 ui.debug("stabilize target %s is plain dead,"
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141 " trying to stabilize on its parent\n" %
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142 obs)
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143 obs = obs.parents()[0]
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144 newer = obsolete.successorssets(repo, obs.node())
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145 if len(newer) > 1 or len(newer[0]) > 1:
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146 raise MultipleSuccessorsError(newer)
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147
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148 return repo[newer[0][0]].rev()
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149
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150 class MultipleSuccessorsError(RuntimeError):
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151 """Exception raised by _singlesuccessor when multiple successor sets exists
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152
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153 The object contains the list of successorssets in its 'successorssets'
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154 attribute to call to easily recover.
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155 """
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156
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157 def __init__(self, successorssets):
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158 self.successorssets = successorssets